GB391162A - Improvements in or relating to film guide mechanism for sound picture apparatus - Google Patents
Improvements in or relating to film guide mechanism for sound picture apparatusInfo
- Publication number
- GB391162A GB391162A GB29028/31A GB2902831A GB391162A GB 391162 A GB391162 A GB 391162A GB 29028/31 A GB29028/31 A GB 29028/31A GB 2902831 A GB2902831 A GB 2902831A GB 391162 A GB391162 A GB 391162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- rollers
- sound
- light beam
- respect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
- G03B31/02—Associated working of cameras or projectors with sound-recording or sound-reproducing means in which sound track is on a moving-picture film
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
391,162. Recording, reproducing, and printing sound-films, optically. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees Pfannenstiehl, H. ; 80, Boulevard West, Mountain Lakes, New Jersey, U.S.A.) Oct. 19, 1931, No. 29028. Convention date, Oct. 31, 1930. [Class 40 (ii).] Relates to a guide mechanism for an optical sound film in sound-picture apparatus, wherein the film is positioned with.respect to the light beam by being passed over a pair of freely rotatable guide rollers one or both of which are obliquely disposed with respect to the film. As shown applied to a sound reproducer, the film 11 is guided at the sound head by rollers 1, 2 which are mounted obliquely with respect to the film and have bevelled edges set at the required angle to engage the film edges. The rollers 1, 2 have shafts 3, 4 respectively, which are journalled to rotate freely in bearings 5, 6. The reproducing light beam is brought to a focus near the film 11 after which it diverges and is directed upon a photo-electric cell 10. By setting the guide roller 2 obliquely, interference with the light beam is avoided. The film is drawn in a curved path over the rollers 1, 2 by a driving sprocket 12, Fig. 2, and the required tension is imparted to the film by drag rollers 15, 17. The roller 17 is mounted on one arm of a bell-crank lever 16, the other arm of which engages a spring 18 which urges the roller 17 against the film 11.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US391162XA | 1930-10-31 | 1930-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB391162A true GB391162A (en) | 1933-04-19 |
Family
ID=21903774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29028/31A Expired GB391162A (en) | 1930-10-31 | 1931-10-19 | Improvements in or relating to film guide mechanism for sound picture apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB391162A (en) |
-
1931
- 1931-10-19 GB GB29028/31A patent/GB391162A/en not_active Expired
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